update ceph source to reef 18.1.2

[ceph.git] / ceph / src / jaegertracing / opentelemetry-cpp / third_party / nlohmann-json / doc / mkdocs / docs / api / basic_json / meta.md

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+# <small>nlohmann::basic_json::</small>meta
+
+```cpp
+static basic_json meta();
+```
+
+This function returns a JSON object with information about the library, including the version number and information on
+the platform and compiler.
+    
+## Return value
+
+JSON object holding version information
+
+| key         | description                                                                                                                                                                                                                                                                    |
+|-------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| `compiler`  | Information on the used compiler. It is an object with the following keys: `c++` (the used C++ standard), `family` (the compiler family; possible values are `clang`, `icc`, `gcc`, `ilecpp`, `msvc`, `pgcpp`, `sunpro`, and `unknown`), and `version` (the compiler version). |
+| `copyright` | The copyright line for the library as string.                                                                                                                                                                                                                                  |
+| `name`      | The name of the library as string.                                                                                                                                                                                                                                             |
+| `platform`  | The used platform as string. Possible values are `win32`, `linux`, `apple`, `unix`, and `unknown`.                                                                                                                                                                             |
+| `url`       | The URL of the project as string.                                                                                                                                                                                                                                              |
+| `version`   | The version of the library. It is an object with the following keys: `major`, `minor`, and `patch` as defined by [Semantic Versioning](http://semver.org), and `string` (the version string).                                                                                  |
+
+## Exception safety
+
+Strong guarantee: if an exception is thrown, there are no changes to any JSON value.
+
+## Complexity
+
+Constant.
+
+## Examples
+
+??? example
+
+    The following code shows an example output of the `meta()`
+    function.
+    
+    ```cpp
+    --8<-- "examples/meta.cpp"
+    ```
+    
+    Output:
+    
+    ```json
+    --8<-- "examples/meta.output"
+    ```
+
+## Version history
+
+- Added in version 2.1.0.